What happened: The Miami Dolphins signed defensive lineman Keith Cooper Jr. to their active roster off Carolina's practice squad on Wednesday. The move brings Cooper back to Miami after the team previously released him from its practice squad in October.
Why it matters: Signing a player off an opposing practice squad requires Miami to keep Cooper on its 53-man active roster for at least three weeks under NFL roster rules. The addition bolsters depth along the interior defensive front as the regular season moves into its second half.
By the numbers: Cooper has 1 tackle in 2026 through 3 games.
What to watch: Cooper joins the active roster ahead of Miami's next regular-season matchup.